Table 2.

Retinoblastoma Patient Summary Characteristics

Total Patients	1,452
Mean age (range)	1.44 years (<1 to 42 years)
Mean follow-up interval	129.1 months
Gender
Male	52.1%
Female	47.9%
Race
White	50.1%
White categorized as Hispanic origin	23.6%
Black	14.3%
Asian or Pacific Islander	9.0%
American Indian/Alaska Native	1.9%
Unknown	1.1%
Laterality
Unilateral	71.0%
Bilateral	29.0%
Tumor Grade
Grade 1 (well differentiated)	10.9%
Grade 2 (moderately differentiated)	1.4%
Grade 3 (poorly differentiated)	6.1%
Grade 4 (undifferentiated)	12.2%
Unknown	69.5%